Manual Furuno 1942MK2 (page 37 of 46) (English)

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6-4

6.3 Acquiring Targets

Manual acquisition

Follow the steps below to manually acquire

a target. Up to 10 targets can be manually

acquired.

1. Place the cursor (+) on a target of inter-

est by operating the omnipad.

2. Press the [ACQ/ENTER] key.

The plot symbol changes its shape accord-

ing to the status as below. A vector appears

in about one minute after acquisition indicat-

ing the target's motion trend. If the target is

consistently detected for three minutes, the

plot symbol changes to a solid mark. If ac-

quisition fails, the target symbol blinks and

disappears shortly thereafter.

SQUARE (dotted)

Immediately after acquisition - Plot symbol

shown in broken lines.

SQUARE (dotted with a vector)

One minute after acquisition - Vector still un-

reliable.

CIRCLE (Solid with a vector)

3 minutes after acquisition - Plot symbol

changes to a solid circle indicating the stable

tracking condition.

LARGE CIRCLE

The plot symbol of a target under tracking

becomes twice as large as the normal sym-

bol when the target is selected for data read-

ing.

Note 1: The target to be acquired should be

within 0.2 to 16 nm from own ship and not

obscured by sea or rain clutter for success-

ful acquisition.

Note 2: When you want to acquire 11th tar-

get, cancel tracking of the one of less impor-

tant targets.

Note 3: When the auto acquisition mode

(Auto ACQ) is on, up to five targets can be

acquired. For details, see next section titled

Automatic Acquisition.

When a tracked target nears another

tracked target, the targets may be

"swapped." When two targets come close

to each other, one of the two can become

a "lost target." Should this happen,

reacquisition of the "lost target" is required

after the two targets have separated.

CAUTION

Automatic acquisition

The Auto Plotter ARP-10 can acquire up to

five targets automatically by setting the Auto

Acquisition area predefined in the system. If

Auto ACQ is selected after more than five tar-

gets have been manually acquired, only the

remaining capacity of targets can be auto-

matically acquired. (For example; when

seven targets are acquired manually, and

then the Auto ACQ is switched on only three

targets can be acquired automatically.) When

five targets have been automatically ac-

quired, "AUTO TARGET FULL" message

appears at top left corner on the display.

Setting auto acquisition area

Auto acquisition area is predefined between

2.0 and 2.5 nm in range and 45° on either

side of the heading marker in bearing. If a

target come into this area, it is acquired au-

tomatically.

Figure 6-3 Auto acquisition area

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Furuno 1942MK2 Manual

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